. >>> the chicago transportation authority is suing united airlines. they claim the airline is buying its jet fuel 70 miles away to avoid paying close to $300 million in sales taxes. the airline says the suit's claims are untrue. >>> students at the university of vermont should not bring bottled water had they return to campus because the school has banned its sale for environmental reasons. vermont is the largest public university to prohibit bottled water sales on campus. they've even converted water fountains to bottle-filling stations. >>> over to wall street this tuesday morning. the dow opens the day at 13,507 after adding 18 points yesterday. the s&p and nasdaq were both down. overseas the nikkei gained 77 points but the hang seng fell 31. >>> the nasdaq and the s&p slipped monday thanks to worries that apple has gone sour. shares of the tech titan dipped below 500 for the first time in nearly a year after reports the company has cut orders for iphone parts due to weak demand. >>> meanwhile, pc maker dell surged 13% on fresh takeover talk. after